US8786948B2 - Apparatus for illuminating a reticle - Google Patents
Apparatus for illuminating a reticle Download PDFInfo
- Publication number
- US8786948B2 US8786948B2 US13/050,258 US201113050258A US8786948B2 US 8786948 B2 US8786948 B2 US 8786948B2 US 201113050258 A US201113050258 A US 201113050258A US 8786948 B2 US8786948 B2 US 8786948B2
- Authority
- US
- United States
- Prior art keywords
- marking
- reticle
- mirror
- light source
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/14—Viewfinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G1/00—Sighting devices
- F41G1/32—Night sights, e.g. luminescent
- F41G1/34—Night sights, e.g. luminescent combined with light source, e.g. spot light
- F41G1/345—Night sights, e.g. luminescent combined with light source, e.g. spot light for illuminating the sights
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/32—Fiducial marks and measuring scales within the optical system
- G02B27/34—Fiducial marks and measuring scales within the optical system illuminated
Definitions
- the invention relates to an apparatus for illuminating a marking, which is applied on a planar transparent reticle in the form of a diffraction structure.
- EP 0 886 163 B1 discloses an optical device having an illuminated reticle.
- the reticle consists of a planar transparent carrier plate, onto which a marking which is in the form of a diffraction structure is applied.
- Reticles are used especially in sighting telescopes for marking a target.
- the marking is located in an intermediate image plane of the sighting telescope.
- the marking can be applied, in the direction of light of the sighting telescope, on the front or back of the carrier plate.
- the marking is illuminated through the edge surface of the carrier plate by a light source which is arranged laterally to the carrier plate. Owing to the action of the diffraction structure, the illuminating beams are directed, in the first order of diffraction, in the direction of the optical axis of the sighting telescope toward the observer, with the result that the marking becomes visible to the observer in the intermediate image.
- EP 1 653 271 B1 discloses an illuminating apparatus, with which the illumination of the diffraction structure of the known reticle is improved with the result that greater brightness and greater contrast of the marking in the intermediate image are achieved.
- the illuminating apparatus consists of a mirror, arranged laterally next to the carrier plate of the marking, having a mirror surface which is curved such that the mirror has two focal points.
- the light source is located in the region of one focal point.
- the light beams reflected by the mirror converge toward the marking which is located in the second focal point of the mirror.
- the light beams are directed onto the marking immediately or after one or more total internal reflections on an inside surface of the carrier plate.
- the mirror surface is preferably intended to be arranged on the back of a mirror element onto which light is emitted from the front by the light source.
- a light-emitting diode with a prespecified emission wavelength is provided as the light source.
- the mirror element can be attached to the edge of the carrier plate especially by way of adhesive bonding.
- the light-emitting diode can be connected to the front of the mirror element.
- the invention was based on an object of expanding the apparatus in a manner such that the same marking can be displayed in various colors.
- FIG. 1 shows a top view of a reticle having two coupling-in regions
- FIG. 2 shows a beam bundle injected via a first coupling-in region
- FIG. 3 shows a beam bundle injected via a second coupling-in region.
- FIG. 1 shows, in top view, a reticle 1 having a grating structure 3 located in the surface region 2 .
- the surface region 2 has a diameter of about 1.6 mm, for example, and appears in the diffraction pattern as a luminous point.
- Two coupling-in elements 4 , 5 which each represent an illuminating system comprising a mirror element and an LED and are located diametrically opposed to one another, are molded onto the reticle 1 .
- the coupling-in elements 4 , 5 can be designed for different wavelengths of the LED and thus for different color displays of the marking.
- ⁇ represents the angle of incidence under which the illuminating beam strikes the plane of the grating structure
- ⁇ ′ the emission angle of the diffracted beam with respect to the perpendicular to the grating structure
- g the grating constant
- ⁇ the wavelength of the illuminating beam
- n the refractive index of the medium upstream of the grating
- n′ the refractive index of the medium downstream of the grating in the direction of light
- m the order of diffraction.
- a specific wavelength ⁇ 0 a refractive index n of the carrier plate, a suitable grating constant g 0 and an associated angle of incidence ⁇ 0 need to be defined.
- the emission angle ⁇ ′ is a function of the wavelength ⁇ , and of the defined constant parameters, specifically of the grating constant g 0 , of the angle of incidence ⁇ 0 and of the refractive index n of the carrier plate.
- ⁇ ′ ⁇ ( ⁇ ) arcsin ⁇ ( m ⁇ ⁇ - n ⁇ g 0 ⁇ sin ⁇ ⁇ ⁇ 0 n ⁇ g 0 ) ⁇ ⁇ ( reflective ⁇ ⁇ grating )
- ⁇ ′ ⁇ ( ⁇ ) arcsin ⁇ ( m ⁇ ⁇ - n ⁇ g 0 ⁇ sin ⁇ ⁇ ⁇ 0 g 0 ) ⁇ ⁇ ( transmissive ⁇ ⁇ grating )
- the angle of incidence ⁇ is a function of the wavelength ⁇ , of the grating constant g 0 , of the used order of diffraction m 0 and of the refractive index n of the carrier plate:
- ⁇ ⁇ ( ⁇ ) arcsin ⁇ ( m 0 ⁇ ⁇ n ⁇ g 0 )
- the grating constant g 0 and the refractive index n are prespecified here as constant.
- a second illumination with the wavelength ⁇ 1 is provided by arranging an LED with the wavelength ⁇ 1 on that side of the carrier plate 1 perpendicular to the grating structure 14 which is located opposite the LED with the wavelength ⁇ 0 .
- ⁇ ⁇ ( ⁇ 1 ) arcsin ⁇ ( - m 0 ⁇ ⁇ 1 n ⁇ g 0 ) .
- the different values for the angles of incidence ⁇ ( ⁇ 0 ) and ⁇ ( ⁇ 1 ) can be seen on the basis of different distances of the points of incidence of the illuminating beam bundles 6 , 7 from the edge region of the reticle 1 .
- First and second mirror elements 8 , 9 which are known per se, are placed adjoining the edge regions of the reticle 1 .
- An LED 10 with the wavelength ⁇ 0 is connected to the first mirror element 8 and an LED 11 with the wavelength ⁇ 1 is connected to the second mirror element 9 .
- the surface region 2 with the grating structure is located in the second focal point of the respective mirror elements 8 , 9 .
- the grating structure can in this case also be illuminated with more than two colors.
- An apparatus can be provided for a continuous change in the colors and thus the wavelengths, which are emitted by an LED, in which apparatus the LED and the associated mirror elements are rotated such that the angle of incidence ⁇ satisfies the prescribed functional dependence, wherein the imaging of the LED onto the grating structure remains.
- the LED can be moved with the mirror element via a mechanical cam.
Abstract
Description
m·λ=n·g·sin α+n′·g·sin α′
m·λ=n·g·sin α
thus results for the difference between the necessary angles of incidence Δα for illumination with two different colors.
α′(λ0)=α′(λ1)=0
Claims (2)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202010003869U DE202010003869U1 (en) | 2010-03-19 | 2010-03-19 | Device for illuminating a reticle |
DE202010003869U | 2010-03-19 | ||
DE202010003869.3 | 2010-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20110228395A1 US20110228395A1 (en) | 2011-09-22 |
US8786948B2 true US8786948B2 (en) | 2014-07-22 |
Family
ID=42339217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/050,258 Active 2031-11-23 US8786948B2 (en) | 2010-03-19 | 2011-03-17 | Apparatus for illuminating a reticle |
Country Status (3)
Country | Link |
---|---|
US (1) | US8786948B2 (en) |
EP (1) | EP2367040A1 (en) |
DE (1) | DE202010003869U1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5335584B2 (en) | 2009-07-09 | 2013-11-06 | 株式会社 ニコンビジョン | Reticle unit and optical equipment |
JP5926188B2 (en) * | 2010-10-25 | 2016-05-25 | 株式会社 ニコンビジョン | Reticle unit, optical equipment and rifle scope |
DE102014101310A1 (en) * | 2014-02-03 | 2015-08-06 | Leica Camera Ag | Method for suppressing false light |
US10670852B2 (en) * | 2017-02-09 | 2020-06-02 | Lightforce Usa, Inc. | Laser diode reticle illumination |
DE102017204094A1 (en) * | 2017-03-13 | 2018-09-13 | IMT Masken und Teilungen AG | Reticule with illumination device |
JP2021518524A (en) * | 2018-03-20 | 2021-08-02 | シェルタード ウィングス インコーポレイテッド | Observation optics with pedestal with optical module |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB402825A (en) | 1932-06-10 | 1933-12-11 | Odhams Press Ltd | Improvements in and relating to luminous signs and indicating devices |
DE2529418A1 (en) | 1974-07-11 | 1976-01-29 | France Etat | LIGHTING DEVICE FOR THE GRID PLATE OF AN OPTICAL DEVICE |
US4214371A (en) * | 1977-01-27 | 1980-07-29 | Bush Benjamin F | Device for illuminating reticles in optical instruments |
US4710636A (en) * | 1984-08-31 | 1987-12-01 | Bausch & Lomb Incorporated | Reticle plate having a fluorescing pattern |
US20020163791A1 (en) | 2001-04-10 | 2002-11-07 | Hoelen Christoph Gerard August | Illumination system and display device |
EP0886163B1 (en) | 1997-06-21 | 2004-04-14 | Dr. Johannes Heidenhain GmbH | Fiducial mark and optical system having a fiducial mark capable to be illuminated |
US20060092507A1 (en) * | 2004-10-29 | 2006-05-04 | Dietmar Menges | Reticle and use thereof for an aiming telescope |
US20080186485A1 (en) * | 2007-02-05 | 2008-08-07 | Conrad Stenton | Optical sight with reticle including a quantum-dot light emitter |
US20090109529A1 (en) * | 2007-10-24 | 2009-04-30 | Raytheon Company | Method and Apparatus for Illuminating a Reticle |
WO2011004709A1 (en) | 2009-07-09 | 2011-01-13 | 株式会社ニコンビジョン | Reticle unit and optical device |
-
2010
- 2010-03-19 DE DE202010003869U patent/DE202010003869U1/en not_active Expired - Lifetime
-
2011
- 2011-03-08 EP EP11001923A patent/EP2367040A1/en not_active Withdrawn
- 2011-03-17 US US13/050,258 patent/US8786948B2/en active Active
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB402825A (en) | 1932-06-10 | 1933-12-11 | Odhams Press Ltd | Improvements in and relating to luminous signs and indicating devices |
DE2529418A1 (en) | 1974-07-11 | 1976-01-29 | France Etat | LIGHTING DEVICE FOR THE GRID PLATE OF AN OPTICAL DEVICE |
GB1515553A (en) | 1974-07-11 | 1978-06-28 | France Armed Forces | Optical illumination device |
US4214371A (en) * | 1977-01-27 | 1980-07-29 | Bush Benjamin F | Device for illuminating reticles in optical instruments |
US4710636A (en) * | 1984-08-31 | 1987-12-01 | Bausch & Lomb Incorporated | Reticle plate having a fluorescing pattern |
EP0886163B1 (en) | 1997-06-21 | 2004-04-14 | Dr. Johannes Heidenhain GmbH | Fiducial mark and optical system having a fiducial mark capable to be illuminated |
US20020163791A1 (en) | 2001-04-10 | 2002-11-07 | Hoelen Christoph Gerard August | Illumination system and display device |
US20060092507A1 (en) * | 2004-10-29 | 2006-05-04 | Dietmar Menges | Reticle and use thereof for an aiming telescope |
EP1653271B1 (en) | 2004-10-29 | 2008-08-13 | Swarovski Optik KG | Reticle and its use in a telescopic sight |
US20080186485A1 (en) * | 2007-02-05 | 2008-08-07 | Conrad Stenton | Optical sight with reticle including a quantum-dot light emitter |
US20090109529A1 (en) * | 2007-10-24 | 2009-04-30 | Raytheon Company | Method and Apparatus for Illuminating a Reticle |
WO2011004709A1 (en) | 2009-07-09 | 2011-01-13 | 株式会社ニコンビジョン | Reticle unit and optical device |
US20120113507A1 (en) * | 2009-07-09 | 2012-05-10 | Satoshi Arai | Reticle unit and optical apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP2367040A1 (en) | 2011-09-21 |
DE202010003869U1 (en) | 2010-07-15 |
US20110228395A1 (en) | 2011-09-22 |
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AS | Assignment |
Owner name: LEICA CAMERA AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KAMMANS, SIGRUN;REEL/FRAME:025979/0415 Effective date: 20110314 |
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Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) Year of fee payment: 4 |
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